Wildcard issuance and validation hasn't been implemented yet, but I see no reason why this shouldn't be possible once the feature is rolled out. My best guess i

Wildcard issuance and validation hasn't been implemented yet, but I see no reason why this shouldn't be possible once the feature is rolled out. My best guess is that you'll be able to mix wildcards and FQDNs to your liking, provided that you can demonstrate control of all domains.